Multipart core



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M. GUYOT MULTIPART CORE Filed Aug. 20, 1921 2 sheets-sheet l Patented Mar. 2(0), 11.923.

NETE@ STATES 31,449,997 PATENT @FFTCO MARIUS GUYOTQOF CLEVELAND, OHIO, ASSIGNOR TO ALUMINUM IVIANUFACTURES, INC., 0F CLEVELAND, OHIO, A CORPORATION OF DELAWARE.

MULTIPART CORE.

Application filed August 20, 1921. Serial No. 494,029;

To all whom t may con-cern.:

Be it known that I, MARIUs GUYOT, a citizen of France, and a resident of Cleveland, county vof Cuyahoga, State of Ohio, have invented certain new and useful Improvements in Multipart Cores, of which 'the following is a Specification.

This invention relates in vgeneral to multipart permanent cores for metal molds and is especially concerned with such cores for making hollow metallic castings having recesses enlarged interiorly and relatively restricted at their open ends.

The chief object of the invention is to construct a permanent core for making articles provided with recesses or hollowed out spaces which are restricted at their open ends and enlarged interiorly.v

Another object is to construct a permanent core for casting elongated cup-shaped articles having inwardly diverging inner walls.

Another obj ect is to construct a permanent core for making cup-shaped articles in which the greatest diameter of the hollow space is adjacent the closed end of the article.

Other objects will appearand be pointed out hereinafter.

In the drawings attached hereto and forming a part of this specification:

Figure 1 is a vertical section of a mold for making elongated cup-shaped castings, taken on line 1 1 of Fig. 2.

Fig. 2 is a plan section of the assembled mold taken on line 2-2 of Fig. l;

Fig. 3 is a vertical section of the core taken on line 3 3 of Fig. 1.

Fig. 4 is an enlarged view 'of the core las shown in Fig. 1 certain parts being in/section as taken on line 4 4 of Fig. 5.

Fig. 5 is a bottom plan view of theassembled core'.

Fig. 6 is a cross-section of the core taken on line 6 6 of Fig. 4 showing the crosssectional configuration of the core parts.

Fig. 7 shows on an enlarged scale the tongue and groove interlocking arrangement of the central core part with each of the outside core parts as taken on line 7 7 of Fig. 4.

Fig. 8, taken on line 8 8, Fig. 4, is another view of the tongue and groove connections; and

Fig. 9 is a side yelevation ofthe inner end of the central core part.

Although my invention is equally applicable to tubes and similar articles it will be described in detail, for purposes of illustration only. as embodied in a mold for 'making elongated cup-shaped castings. Y

Figs. 1 and 2 show a permanent metal mold comprising a base 1, two side members 2 mounted thereon and a multipart core designated as an entirety at 3. 4, 5, and 6 designate, respectively, casting, riser and gate cavities formed Ain the meeting faces of the side members 2, the casting cavity being also partly formed in the base 1. Clamps 7, which engage bolts 8, serve to secure the side members in assembled position while handles 9 provide means for readily separating the side memb'ers to remove the casting. Inasmuch as the mold base and side members constituting the mold body are similar in substantially all particulars, including shape, coordination of parts, arrangements for heating, and gate, riser and casting cavity formation and venting, to the well-known piston molds vtypified by U. S. Letters Patent 1,296,597 issued March 4, 1919, to F. A. Parkhurst, such parts will be described here onlybriefly. The core, 3, however, which is one embodiment of my invention will be described more Jfully. Vhen assembled and in position in the casting cavity the outer surface of the inner end of the core constitutes the inner wall of the castingcavity, against which the molten metal solidiiies. The part of the core which enters the casting cavity is substantially cylindrical, withthe inner end composed of one or more portions 10a, 10b having greater dialrespect to its open end, than the open end itself. p

The outer end portion 11 of core 3 is en-A larged to form the upper end wall of the casting cavity and fits within and is gripped and held in assembled relation-by the side members 2 when these members are held together by clamps 7 Outstanding flanges .12 and 13 on the individual outer and central core sections, respectively, seat upon the top while side surfaces 16" of parts'16 and 17IL ofpart 17 extend at an angle to such planes,'

the part 17 having side walls which diverge from the circumference of the core toward the central part thereof. By reason of the divergence of the side walls of part 17, this part is the first one of the out-er corelparts to lbe removed from the casting.

Interlocking ltongues 18 and grooves `19, connect the inner end of part 14'with 'each 'of the outer parts and effectually tie the core parts together, thereby preventing warping and separation ofthe parts.

4The tongues 418 which are preferably carried by the outer core parts, taper in width,

disclosed, the mold side members 2 are locked together in position on base 1. yCore parts 15, 16 and 17 areyirst arranged around the circumference of the casting cavity, each being supported by its flange 12 resting on side members 2, and then core part 14 is inserted in the central opening between the core parts and is driven into assembled relation therewith. f

1t will be noted in Fig. 2 that the core is to positioned in the casting cavity that one of the heavy parts 15 is'located opposite gate and riser cavities 5 and 6. To insure proper location of the core in the casting cavity the meeting faces 15a` of parts 15 are cutaway near the outer end thereof to form :a keyway 21 which engages with a key (not shown) secured to the mold member 2. A further positioning means is shown at the inner end of core 3 where pin 19b is secured in recess 19a in core part 14, as by a rod 20. In as'- Part 14 is substantially an into an opening in base 1 and acts both to vprevent slight shifting or tilting of the core and to form a hole thru the otherwise closed, end of the casting.

After molten metal has filled thejcasting cavity and has solidified therein, the core is removed from the casting as follows. First j laterally into the space normally occupied' by part 14 until its outer surface is clear of the inner wall of the casting, when it is lifted vertically out of the casting. The remaining parts 16 and 15 are then removed successively and rone-at a time by moving each transversely of the casting until freed from the casting walls and then vertically outA of the casting.

To those skilled in the art it will be obvious that my invention makes possible the casting of't-ubes and similar articles as well as cup-shaped articles, eacli having recesses with smaller open ends or mouths'than interiors. Accordingly I do not wish to have my invention limited to the illustrative details set forth above but to-have its scope defined by what is claimed.

What is claimed:

1. A multipart core for hollow articles which comprises, in combination with other core parts, a part substantially pentagona'l in cross-section.

2. A multipart corefor hollow articles which comprisesan lelongated central core part substantially an irregular pentagon in cross-section and a plurality of outer core parts surrounding the sides of the said central core part.

3.`A multipart core for hollow articles which comprises an elongated central core part substantially pentagonal in cross-section and a plurality of outer core parts surrounding the sides of the said central part and having interlocking engagement therewith.

4. A multipart core for a hollow article v'having a recess enlarged interiorly andv relatively vrestricted; at its open end which comprises a central tapered vco-re substantially pentagonal in cross-section and a plurality of outer core parts, the assembled core being enlarged adjacent its inner end.

5. A multipart core for a cup-shaped article having a recessof enlarged diameter adjacent the closed end thereof which com. prises an elongated central part, substantially an irregular pentagon in cross-section7 and a plurality of'outer parts surrounding the sides of the said central part,`

the inner end of the assembled core being enlarged adjacent its inner end.

. 6. A multipart corefor a cup-shaped article having a recess interiorly enlarged and tagonal in cross-section andvtapered fromits outer end toward its inner end, each side face of the said central core part being provided with grooves at the inner end thereof and a plurality of elongated outer core parts surrounding the said central part and having tongues for wedging engagement with the said grooves.y the cross sectional area of the assembled core near the inner end thereof being greater than at the outer end thereof. l A

. 8. A multipart core for hollow articles which comprises a centra-l core section snostantially pentagonal 1n cross section and a plurality of outer core sections each having inner surfaces to engage the said central core section and side surfaces to engage adjacent outer core sections, one of the said outer core sections having inwardly diverging side surfaces.

' 9. multipart core for hollow articles which comprises a. central core section sul? stantially pentagonal in cross section and plurality of outer core sections, each of t said outer core sections havingan inisurface to engage the said @entrai core seetion and side surfaces to enfra'e adiacenti E b .r

outer core sections, certain of the side* s' faces being formed on planes substantie diametrical of the said core and other surfaces being formed on planes incliner! diametrical planes of the said core.

ln testimony whereof l affix my signaturev Martins error. 

